On November 13, 2015, First Mining completed the acquisition of Gold Canyon Resources Inc., which wholly owned the Springpole Gold Project. Springpole is one of Canada's largest undeveloped gold projects and the project's land position covers a total of 32,448 hectares (over 80,000 acres). The project is located in northwestern Ontario, approximately 110 kilometres northeast of the Town of Red Lake, and is situated within the Birch-Uchi Greenstone Belt.

1. Based on the technical report titled "Preliminary Economic Assessment Update for the Springpole Gold Project, Ontario, Canada", dated October 16, 2017, which is available at www.sedar.com under First Mining's SEDAR profile. Readers are cautioned that the PEA is preliminary in nature, it includes inferred mineral resources that are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as mineral reserves, and there is no certainty that the PEA will be realized. Mineral resources that are not mineral reserves do not have demonstrated economic viability.

2. Estimated at $1,300.00/oz. Au and $20.00/oz. Ag.

3. Estimated with a cut-off grade of 0.4 g/t AuEq. Cut-off grades are based on a gold price of $1,400/oz and a gold processing recovery of 80% and a silver price of $15/oz and a silver processing recovery of 60%.

1. Based on the technical report titled "Preliminary Economic Assessment Update for the Springpole Gold Project, Ontario, Canada", dated October 16, 2017, which is available at www.sedar.com under First Mining's SEDAR profile. Readers are cautioned that the PEA is preliminary in nature, it includes inferred mineral resources that are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as mineral reserves, and there is no certainty that the PEA will be realized. Mineral resources that are not mineral reserves do not have demonstrated economic viability.

2. Cut-off grades are based on US$1,400/oz. Au price and Au recoveries of 80%; and a US$15/oz. Ag price and 60% Ag recoveries.

4. The rounding of tonnes may result in apparent differences between tonnes, grade and contained ounces.

5. Mineral resources that are not mineral reserves do not have demonstrated economic viability. The estimate of mineral resources may be materially affected by environmental permitting, legal, title, taxation, sociopolitical, marketing or other relevant issues.

Permitting Roadmap

First Mining has begun consultation efforts with local Indigenous communities within the Springpole Gold Project area to support the federal Environmental Assessment (EA) process which was initiated in March 2018. These consultation efforts with Indigenous communities will be ongoing throughout the EA process, including consultation with local municipalities, government agencies, non-governmental organizations and other stakeholders.

In parallel with the federal EA process, First Mining has also entered into a Voluntary Agreement with the Ontario Ministry of the Environment and Climate Change (“MOECC”) for Springpole and thus initiating an individual provincial EA under the Ontario Environmental Assessment Act. Terms of Reference (“ToR”) for the provincial EA are being prepared and will be submitted to MOECC for review prior to the end of 2018.

The ToR determines the scope of the provincial EA and what alternatives must be assessed as well as environmental aspects that could be impacted by the Project that the provincial EA must consider.